@bunny, try deactivated the earlier plugin and download the latest build version 3.3 (https://github.com/cftp/twitter-tracker/archive/master.zip) go back to your plugins page, click “add new”, then upload your 3.3 download, and finally click install. You will need to “painlessly” Authorize the plugin with your Twitter account and then, your feed are back and working better than ever… no more “43 years” messages or blanks. Looks great!
Hope this helps …